CN112100754B - Method for machining equal-width chamfer - Google Patents
Method for machining equal-width chamfer Download PDFInfo
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- CN112100754B CN112100754B CN202010778866.0A CN202010778866A CN112100754B CN 112100754 B CN112100754 B CN 112100754B CN 202010778866 A CN202010778866 A CN 202010778866A CN 112100754 B CN112100754 B CN 112100754B
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- 238000003754 machining Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005520 cutting process Methods 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 36
- 238000003672 processing method Methods 0.000 claims abstract description 5
- 238000012805 post-processing Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
The invention relates to a processing method of a constant-width chamfer, which comprises the following steps: 3D modeling is carried out on the entity of the appearance piece of the electronic product which is not subjected to the equal-width chamfering; extracting a sheet body from a chamfer surface to be processed of the initial model; performing simulated cutting on the sheet body by using a cutter to form a machining track; converting the processing track into a first curve, and loading the first curve onto an initial model; the method comprises the steps that a cutter is used for carrying out surface cutting processing on the entity of the electronic product appearance piece which is not subjected to equal-width chamfering according to a first curve so as to form a formed equal-width chamfering, the cutter comprises a conical cutting edge, the top point of the conical cutting edge corresponds to one end line of the equal-width chamfering, the outer edge of the bottom surface of the conical cutting edge corresponds to the other end line of the equal-width chamfering, and the cutter is used for carrying out equal-width chamfering one-time processing forming, so that the processing efficiency is improved; the radius of the bottom surface of the conical cutting edge is equal to the design distance of the chamfer angle along the direction vertical to the side wall, so that the machining precision is improved.
Description
Technical Field
The invention relates to the technical field of processing of appearance parts of electronic products, in particular to a processing method of equal-width chamfers.
Background
With the pursuit of the mass, appearance and performance of 3C electronic products (3C electronic products are generally referred to as computers, tablet computers, mobile phones, digital cameras, walkman, electronic dictionaries, video and audio players, or digital audio players, etc.), various industries have pursued and designed the novelty and innovation of the appearance of the products to attract the attention of consumers in recent years. At present, the appearance of the product is generally provided with a chamfer design, so that the chamfering is exquisite for manufacturing enterprises, the chamfering processing yield and efficiency are improved, and the chamfering processing yield and efficiency become a great difficulty for the enterprises.
In the prior art, referring to fig. 1 and 2, the top end of the side wall of the outer appearance piece 100 of the electronic product is provided with an inclined chamfer 13, the conventional cutting speed is slow, and the design distance of the chamfer 13 in the direction perpendicular to the side wall is 0.3, but in the actual formed structure, the distance is generally 0.32 to 0.35, and the difference of the external dimensions is 0.02 to 0.05, so that the processing precision needs to be improved.
Disclosure of Invention
Based on the above, the present invention provides a method for machining a chamfer with equal width, so as to solve the above technical problems in the prior art.
The technical scheme of the invention is as follows: the processing method of the equal-width chamfer comprises the following steps:
3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to equal-width chamfering, so as to obtain an initial model, wherein the initial model comprises a bottom wall and a side wall which is bent and extended from the edge of the bottom wall to the direction far away from the bottom wall and is perpendicular to the bottom wall, and a chamfer surface to be processed is arranged on one side of the side wall far away from the bottom wall;
extracting geometric features of the chamfer surface to be processed of the initial model to obtain a sheet model;
Performing simulated cutting on the sheet body model by using a cutter to form a processing track, wherein the cutter comprises a cutter head and a cutter shaft connected with the cutter head, the cutter head comprises a conical cutter edge, the vertex of the conical cutter edge corresponds to one end line of a formed equal-width chamfer, the outer edge of the bottom surface of the conical cutter edge corresponds to the other end line of the formed equal-width chamfer, and the radius of the bottom surface is equal to the projected width of the chamfer on the plane of the bottom wall along the direction perpendicular to the bottom wall;
converting the processing track into a first curve, and loading the first curve onto the initial model;
and carrying out surface cutting processing on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering according to the first curve by using the cutter so as to form the formed equal-width chamfering.
Preferably, the 3D modeling of the entity of the electronic product appearance piece that is not subjected to the equal-width chamfering to obtain an initial model includes:
And 3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering by utilizing 3D drawing software to obtain an initial model, wherein the 3D drawing software comprises UG, solidWorks, invertor or one of ProE.
Preferably, the converting the processing track into a first curve, loading the first curve onto the initial model includes:
Converting the processing track into points through post-processing, and constructing a curve through the points to form the first curve;
The first curve is wound to the initial model using a winding function in a UG modeling tool.
Preferably, the included angle between the central axis of the conical blade and the generatrix is 45 °.
Preferably, the tool bit further comprises a support column connected to the bottom surface of the conical cutting edge, and the radius of the support column is the same as that of the bottom surface of the conical cutting edge; the cutter also comprises a round table-shaped connecting body connected with the supporting column and the cutter shaft, the radius of one end of the round table-shaped connecting body, which is close to the conical cutting edge, is the same as the radius of the bottom surface of the conical cutting edge, the radius of one end of the round table-shaped connecting body, which is far away from the conical cutting edge, is the same as the radius of the cutter shaft, and the included angle between the central shaft of the round table-shaped connecting body and a generatrix is 20 degrees.
Preferably, the rotating speed of the cutter is 1500 r/min-20000 r/min.
Preferably, the converting the processing track into a first curve, and after loading the first curve onto the initial model, further includes:
Simultaneously performing expansion extension and retraction extension on the first curve at a preset angle in a direction away from the first curve to form an equal-angle curved surface;
intersecting the equal-angle curved surface with the surface of the initial model, wherein the two obtained curves are two end lines of a formed equal-width chamfer respectively, and a curved surface area between the two end lines on the equal-angle curved surface is a chamfer surface of the formed equal-width chamfer;
And 3D modeling is carried out on the entity of the electronic product appearance piece subjected to the equal-width chamfering according to the initial model, the two end lines of the formed equal-width chamfer and the chamfer surface of the formed equal-width chamfer, so as to obtain a formed entity model.
Preferably, the expanding and contracting the first curve at a predetermined angle in a direction away from the first curve simultaneously to form an equal-angle curved surface includes:
and generating the equal-angle curved surface by using the first curve through a rule extension function in a modeling tool of UG, wherein the rule type of a length rule in the rule extension function is constant and has a first constant value, and the rule type of an angle rule is constant and has a second constant angle.
Preferably, the tool is perpendicular to the bottom wall during the cutting process of the constant width chamfer.
Preferably, the sheet model comprises a first sheet corresponding to a side contour of the side wall away from the bottom wall and a second sheet corresponding to a side contour of the side wall facing outward and connected with the first sheet.
The invention has the beneficial effects that: the invention discloses a processing method of a constant-width chamfer, which comprises the following steps: 3D modeling is carried out on the entity of the appearance piece of the electronic product which is not subjected to the equal-width chamfering; extracting a sheet body from a chamfer surface to be processed of the initial model; performing simulated cutting on the sheet body by using a cutter to form a machining track; converting the processing track into a first curve, and loading the first curve onto an initial model; the method comprises the steps that a cutter is used for carrying out surface cutting processing on the entity of the electronic product appearance piece which is not subjected to equal-width chamfering according to a first curve so as to form a formed equal-width chamfering, the cutter comprises a conical cutting edge, the top point of the conical cutting edge corresponds to one end line of the formed equal-width chamfering, the outer edge of the bottom surface of the conical cutting edge corresponds to the other end line of the formed equal-width chamfering, and the cutter is used for carrying out equal-width chamfering once processing forming, so that the processing efficiency is improved; and the bottom radius of the conical blade is equal to the design distance of the chamfer along the direction vertical to the side wall, the size difference of the design distance in the actual forming structure is small, and the processing precision is improved.
Drawings
Fig. 1 is a perspective view of an external appearance of an electronic product according to the present invention;
FIG. 2 is a dimension drawing of an appearance piece of an electronic product processed by a method in the prior art;
FIG. 3 is a top view of the electronic product of FIG. 1;
FIG. 4 is a cross-sectional view in the direction A-A of the outer part of the electronic product shown in FIG. 3;
FIG. 5 is a schematic view of the structure of a tool in the method for machining a constant-width chamfer of the present invention;
FIG. 6 is an enlarged view of the tool of FIG. 5 at I;
FIG. 7 is a schematic structural diagram of an initial model obtained in step one of the method for machining a constant-width chamfer of the present invention;
FIG. 8 is a schematic diagram of a second step in the method of processing a constant width chamfer of the present invention;
FIG. 9 is a schematic structural view of a sheet model obtained in the step two in the method for processing a constant-width chamfer of the present invention;
FIG. 10 is a schematic view of a third step in the method for machining a constant-width chamfer of the present invention;
FIG. 11 is a schematic diagram of step four and step five in the method for processing a constant width chamfer of the present invention;
FIG. 12 is a schematic view of a curved surface of equal width obtained in step five in the method for processing a chamfer of equal width according to the present invention;
Fig. 13 is a flowchart of a method of processing a constant width chamfer of the present invention.
The meaning of the reference numerals in the drawings are:
100-appearance parts of electronic products; 11-a bottom wall; 12-side walls; 13-chamfering with equal width; 13 a-a first end line; 13 b-a second end line; 200-an initial model; 14-chamfer surface to be processed; 300-sheet model; 31-a first sheet; 32-a second sheet; 400-cutter; 41-cutter head; 411-conical blade; 4 a-vertices; 4 b-bottom surface; 4 c-bus; 4 d-central axis; 412-support columns; 42-cutter shaft; 43-a truncated cone-shaped connector; 33-processing track; 34-first curve; 35-an equal angle curved surface.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
For convenience of description, the present invention will be described with reference to an electronic product appearance 100, and as shown in fig. 1, 3 and 4, the electronic product appearance 100 according to an embodiment of the present invention includes a bottom wall 11 and a side wall 12 bent from an edge of the bottom wall 11 to a direction away from the bottom wall 11 and perpendicular to the bottom wall 11, where a side of the side wall 12 away from the bottom wall 11 is provided with a chamfer 13 with equal width. The width chamfers 13 form a circle around the side wall 12, the width chamfers 13 include a first end line 13a and a second end line 13b disposed opposite to each other, and the molding chamfer surfaces of the width chamfers 13 are crimping curved surfaces.
Referring to fig. 1 and fig. 3 to 13, an embodiment of the present invention provides a method for processing a chamfer with equal width, which includes the steps of:
s1, performing 3D modeling on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering to obtain an initial model 200.
In order to find a machining track (tool path track) of a tool machining product entity, firstly, a 3D modeling is required to be performed on an electronic product appearance piece which is not subjected to equal-width chamfering, as shown in fig. 7, an obtained initial model 200 is similar to the electronic product appearance piece 100 in structure, the initial model 200 comprises a bottom wall 11 and a side wall 12 which is bent and extended from the edge of the bottom wall 11 to a direction away from the bottom wall 11 and is perpendicular to the bottom wall 11, a chamfer surface 14 to be machined is arranged on one side of the side wall 12 away from the bottom wall 12, and an equal-width chamfer 13 is formed after the chamfer surface 14 is subjected to equal-width chamfering.
In this embodiment, the 3D modeling is performed in 3D cartographic software. Further, the 3D mapping software may be one of UG, solidWorks, invertor, or ProE, or other 3D mapping software as is common.
S2, extracting geometric features of the chamfer surface 14 to be processed of the initial model 200 to obtain a sheet model 300.
Referring to fig. 8 and 9, the chamfer 14 to be machined is extracted to obtain a sheet model 300, and the sheet model 300 includes a first sheet 31 corresponding to a contour of a side of the sidewall 12 away from the bottom wall 11, and a second sheet 32 corresponding to a contour of a side of the sidewall 12 facing outward and connected to the first sheet 31.
S3, performing simulated cutting on the sheet model 300 by using the tool 400 to form a machining track 33.
In this embodiment, the simulated cutting may be implemented by using a UG machining function, referring to fig. 6 and 7, the tool 400 includes a tool bit 41 and a cutter shaft 42 connected to the tool bit 41, the tool bit 41 includes a conical blade 411 and a supporting column 412, an apex 4a of the conical blade 411 corresponds to a first end line 13a of the formed equal-width chamfer 13, an outer edge of a bottom surface 4b of the conical blade 411 corresponds to a second end line 13b of the formed equal-width chamfer 13, a length of a generatrix 4c of the conical blade 411 is equal to a chamfer width of the equal-width chamfer 13, a width of the bottom surface 4b is equal to a width of a projection of the equal-width chamfer 13 on a plane of the bottom wall 11 along a direction perpendicular to the bottom wall 11, and the projected width is a design distance of the chamfer 13 along a direction perpendicular to the side wall 12. Support column 412 is connected to bottom surface 4b of conical blade 411, and the radius of support column 412 is the same as the radius of bottom surface 4b of conical blade 411.
In this embodiment, the angle between the central axis 4d of the conical blade 411 and the generatrix 4c is 45 °. Further, the tool 400 further includes a circular truncated cone-shaped connector 43 connecting the support column 412 and the cutter shaft 42, a radius of an end of the circular truncated cone-shaped connector 43 near the circular conical blade 411 is the same as a radius of the bottom surface 4b of the circular conical blade 411, a radius of an end of the circular truncated cone-shaped connector 43 away from the circular conical blade 411 is the same as a radius of the cutter shaft 42, and an included angle between a central axis 4d (same as a central axis of the circular truncated cone-shaped connector 411) of the circular truncated cone-shaped connector 43 and a generatrix 4c is 20 °.
Fig. 8 is a schematic view of a front view of the sheet model 300, fig. 9 is a schematic view of a back view of the sheet model 300, the simulated cutting process is performed on a surface of the first sheet 31 and the second sheet 32, which is attached to the initial model 200 (i.e., a back surface of the sheet model 300), the first sheet 31 and the second sheet 32 shown in fig. 8 are separated from the initial model 200 and turned over, so that the sheet model 300 shown in fig. 9 is obtained, and then the simulated cutting is performed. Referring to fig. 10, in the simulated cutting process, a tool model is obtained by performing 3D modeling on the tool 400, and for convenience of description, the tool model and the tool 400 use the same reference numerals, and the simulated cutting is performed on the sheet model 300 by using the tool model, wherein the vertex 4a of the conical blade 411 is tangential to the first sheet 31, the outer edge of the bottom surface 4b of the conical blade 411 is tangential to the second sheet 32, the tool 400 is perpendicular to the bottom wall 11, and the processing track 33 is a path track formed by the vertex 4a of the conical blade 411 on the first sheet 31.
S4, converting the processing track 33 into a first curve 34, and loading the first curve 34 onto the initial model 200.
The post-processing function of UG is used to convert the machining trace 33 into the first curve 34, and since the simulated cutting process in step S3 is performed on the back surface of the sheet body model 300, the sheet body model 300 is separated from the initial model 200 in step S3, the formed machining trace 33 and the first curve 34 converted by the machining trace 33 are separated from the initial model 200, and in step S4, the formed first curve 34 needs to be added to the initial model 200 to complete the cutting modeling.
In an alternative implementation of the present embodiment, the processing track 33 is converted into points through post-processing, and the first curve 34 is formed through the points; the first curve 34 is wound to the initial phantom 200 using a winding function in the UG modeling tool.
S5, performing 3D modeling on the entity of the electronic product appearance piece subjected to the equal-width chamfering to obtain a molded entity model.
In this embodiment, referring to fig. 11 to 12, first, the first curve 34 is simultaneously extended and retracted at a predetermined angle in a direction away from the first curve 34 to form an equal angle curved surface 35; then, the equal angle curved surface 35 and the surface of the initial model 200 are intersected, the two obtained curved surfaces are respectively a first end line 13a and a second end line 13b of the formed equal width chamfer 13, and a curved surface area between the first end line 13a and the second end line 13b on the equal angle curved surface 13 is a chamfer surface of the formed equal width chamfer 13; then, 3D modeling is performed on the entity of the electronic product appearance piece subjected to the equal-width chamfering according to the initial model 200, the first end line 13a and the second end line 13b of the formed equal-width chamfer 13, and the chamfer surface of the formed equal-width chamfer 13, so as to obtain a formed entity model. Specifically, the first curve 34 is extended at a predetermined angle to form the constant angle curved surface 35 by: the first curve 34 is used to generate the equiangular curve 35 in the modeling tool of UG by means of a rule extension function, wherein the rule type of length rule in the rule extension function is constant and has a first constant value, the rule type of angle rule is constant and has a second constant angle, for example, the first constant value may be 2mm, and the second constant angle may be 45 °.
In this embodiment, a first curve 34 is formed through a modeling processing track 33, an equal-angle curved surface 35 is formed through regular extension of the first curve 34, and a formed equal-width chamfer 13 is determined through the intersection line of the equal-angle curved surface 35 and the initial model 200, so that 3D modeling of the entity of the electronic product appearance piece with the equal-width chamfer is realized for further reference of technicians.
And S6, performing surface cutting processing on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering according to the first curve 34 on the initial model 200 by using the cutter 400 so as to form the formed equal-width chamfer 13.
In step S6, a CNC program is programmed, which can convert the data coordinates of the first curve 34 into the movement of the cutting machine, based on the positional relationship of the first curve 34 and the initial model 200, according to the kinematic chain relationship existing between the axes of the specific cutting machine. The code of the CNC program is input into a cutting machine tool, the tool 400 is arranged on the cutting machine tool, and the cutting machine tool drives the tool 400 to cut the entity of the electronic product appearance part which is not subjected to the equal-width chamfering according to the CNC program.
In this embodiment, during the cutting process of the equal-width chamfer, the tool 400 is perpendicular to the bottom wall 11, the vertex 4a of the conical blade 411 corresponds to the first end line 13a of the formed equal-width chamfer 13, and the outer edge of the bottom surface 4b of the conical blade 411 corresponds to the second end line 13b of the formed equal-width chamfer 13. The rotating speed of the cutter 400 is 1500 r/min-20000 r/min.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The processing method of the equal-width chamfer is characterized by comprising the following steps:
3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to equal-width chamfering, so as to obtain an initial model, wherein the initial model comprises a bottom wall and a side wall which is bent and extended from the edge of the bottom wall to the direction far away from the bottom wall and is perpendicular to the bottom wall, and a chamfer surface to be processed is arranged on one side of the side wall far away from the bottom wall;
extracting geometric features of the chamfer surface to be processed of the initial model to obtain a sheet model;
Performing simulated cutting on the sheet body model by using a cutter to form a processing track, wherein the cutter comprises a cutter head and a cutter shaft connected with the cutter head, the cutter head comprises a conical cutter edge, the vertex of the conical cutter edge corresponds to one end line of a formed equal-width chamfer, the outer edge of the bottom surface of the conical cutter edge corresponds to the other end line of the formed equal-width chamfer, and the radius of the bottom surface is equal to the projected width of the chamfer on the plane of the bottom wall along the direction perpendicular to the bottom wall;
converting the processing track into a first curve, and loading the first curve onto the initial model;
performing surface cutting processing on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering according to the first curve by using the cutter so as to form the formed equal-width chamfering;
the converting the processing track into a first curve, loading the first curve onto the initial model, includes:
Converting the processing track into points through post-processing, and constructing a curve through the points to form the first curve;
The first curve is wound to the initial model using a winding function in a UG modeling tool.
2. The method for machining a uniform-width chamfer according to claim 1, wherein the 3D modeling of the entity of the electronic product appearance piece not subjected to the uniform-width chamfer to obtain the initial model comprises:
And 3D modeling is carried out on the entity of the electronic product appearance piece which is not subjected to the equal-width chamfering by utilizing 3D drawing software to obtain an initial model, wherein the 3D drawing software comprises UG, solidWorks, invertor or one of ProE.
3. The method of claim 1, wherein the angle between the central axis of the conical blade and the generatrix is 45 °.
4. The method of machining a constant width chamfer according to claim 1, wherein the tool bit further comprises a support post connected to the bottom surface of the conical blade, the support post having a radius equal to the bottom surface radius of the conical blade; the cutter also comprises a round table-shaped connecting body connected with the supporting column and the cutter shaft, the radius of one end of the round table-shaped connecting body, which is close to the conical cutting edge, is the same as the radius of the bottom surface of the conical cutting edge, the radius of one end of the round table-shaped connecting body, which is far away from the conical cutting edge, is the same as the radius of the cutter shaft, and the included angle between the central shaft of the round table-shaped connecting body and a generatrix is 20 degrees.
5. The method for machining a constant-width chamfer according to claim 1, wherein the rotation speed of the cutter is 1500r/min to 20000r/min.
6. The method of machining a constant width chamfer according to claim 1, wherein the converting the machining trajectory into a first curve, and after loading the first curve onto the initial model, further comprises:
Simultaneously performing expansion extension and retraction extension on the first curve at a preset angle in a direction away from the first curve to form an equal-angle curved surface;
intersecting the equal-angle curved surface with the surface of the initial model, wherein the two obtained curves are two end lines of a formed equal-width chamfer respectively, and a curved surface area between the two end lines on the equal-angle curved surface is a chamfer surface of the formed equal-width chamfer;
And 3D modeling is carried out on the entity of the electronic product appearance piece subjected to the equal-width chamfering according to the initial model, the two end lines of the formed equal-width chamfer and the chamfer surface of the formed equal-width chamfer, so as to obtain a formed entity model.
7. The method of machining a constant width chamfer according to claim 6, wherein simultaneously expanding and contracting the first curve in a direction away from the first curve at a predetermined angle to form a constant angle curved surface comprises:
and generating the equal-angle curved surface by using the first curve through a rule extension function in a modeling tool of UG, wherein the rule type of a length rule in the rule extension function is constant and has a first constant value, and the rule type of an angle rule is constant and has a second constant angle.
8. The method of machining a constant width chamfer according to claim 1, wherein the cutter is perpendicular to the bottom wall during the cutting process of the constant width chamfer.
9. The method of machining a constant-width chamfer according to claim 1, wherein the sheet model includes a first sheet corresponding to a contour of a side of the side wall facing away from the bottom wall and a second sheet corresponding to a contour of a side of the side wall facing outward and connected to the first sheet.
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